Q&A - That is this weed? - Prickly Lettuce

Question:What in the world has snuggled itself in my bee balm? It is about three feet tall and looks dangerous. The leaves are 4-6 inches. I don't know if I should touch it, kill it or welcome it to my family plot?

Answer: It is prickly lettuce. Prickly Lettuce is a weed that can reach heights of about six feet. It has thorns on the stalk and leaves. It also has a yellow flower.